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| INTERNATIONAL CLASSIFICATIONS |
AWS/ASME A 5.13 ECoCr-E
EN 14700 E Co1
DIN 8555: E20-UM-350-CKTZ
| FEATURES & APPLICATIONS |
High-duty overlays of sealing faces and moving parts of valve seats and valves of combustion engines, for pumps and fittings for gas, water, steam and acids, gas turbines and hot working tools.
- Extremely smooth running Alloy 21 Cobalt electrode.
- Excellent resistance to metal and mineral abrasion.
- Slag is self releasing.
- Weld deposits are unusually fine rippled and uniform.
- Available bare as product code 1290.
- Special technology also performs on AC current.
| All Weld Metal Analysis (Typical Weight %) |
Microstructure: Cobalt based austenite with some carbides and other complex phases.
Flux Color: Grey
Tip Color: Black
| C | Mn | Si | Cr | Fe | Mo | Ni | W | Co |
| .25 | 1.5 | 1.0 | 27 | 2 | 6 | 4 | .50 | Bal. |
| Typical Mechanical Properties |
Undiluted Weld Metal Maximum Value Up to:
Hardness
Room Temperature: 68°F (20°C) Rockwell C30-32
Work Hardened Rockwell C45
Elevated Temperatures: 750°F (400°C) Rockwell C33
110°F (600°C) Rockwell C30
1475°F (800°C) Rockwell C28
1620°F (900°C) Rockwell C26
| Welding Current & Instructions |
Recommended Current: AC or DC Reverse (+)
Welding Techniques: Preheat massive parts to 570°F (300°C). Minimize amperage during welding.
Recommended Amperage Settings:
| Diameter (mm) | 3/32(2.5) | 1/8(3.25) | 5/32 (4.0) |
| Minimum Amperage | 65 | 80 | 100 |
| Maximum Amperage | 85 | 110 | 130 |
Welding Positions: Flat, horizontal
Deposition Rates:
| Diameter (mm) | Length (mm) | Weldmetal/ Electrode | Electrodes per lb (kg) of Weldmetal | Arc Time of Deposition min/lb (kg) | Amperage Settings | Recovery Rate |
| 3/32 (2.5) | 14″ (350) | .80 oz. (22g) | 20 (44) | 19 (42) | 75 | 130% |
| 1/8 (3.25) | 14″(350) | 1.2 oz (33g) | 13 (29) | 14 (31) | 95 | 130% |
| 5/32 (4.0) | 14″ (350) | 1.56 oz (44g) | 10 (22) | 11 (24) | 115 | 130% |
| APPROXIMATE ELECTRODE PACKAGING & DIMENSIONS |
| Diameter (mm) | 3/32 (2.5) | 1/8 (3.25) | 5/32 (4.0) |
| Length (mm) | 14″ (350) | 14″ (350) | 14″ (350) |
| Electrodes / lb | 18 | 11 | 7 |
| Electrodes / kg | 40 | 25 | 16 |